Jens Axboe <axboe@xxxxxxxxx> writes:
On 4/3/19 5:11 AM, Will Deacon wrote:
On Wed, Apr 03, 2019 at 01:47:50PM +1100, Michael Ellerman wrote:
Arnd Bergmann <arnd@xxxxxxxx> writes:
diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl
index b18abb0c3dae..00f5a63c8d9a 100644
--- a/arch/powerpc/kernel/syscalls/syscall.tbl
+++ b/arch/powerpc/kernel/syscalls/syscall.tbl
@@ -505,3 +505,7 @@
421 32 rt_sigtimedwait_time64 sys_rt_sigtimedwait compat_sys_rt_sigtimedwait_time64
422 32 futex_time64 sys_futex sys_futex
423 32 sched_rr_get_interval_time64 sys_sched_rr_get_interval sys_sched_rr_get_interval
+424 common pidfd_send_signal sys_pidfd_send_signal
+425 common io_uring_setup sys_io_uring_setup
+426 common io_uring_enter sys_io_uring_enter
+427 common io_uring_register sys_io_uring_register
Acked-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> (powerpc)
Lightly tested.
The pidfd_test selftest passes.
That reports pass for me too, although it fails to unshare the pid ns, which I
assume is benign.
If you run it as root it should work?
Ran the io_uring example from fio, which prints lots of:
How did you invoke that? I had a play with the tests in:
It's t/io_uring from the fio repo:
git://git.kernel.dk/fio
and you just run it ala:
# make t/io_uring
# t/io_uring /dev/some_device
Yeah that's all I did.
will@autoplooker:~/liburing/test$ ./io_uring_register
RELIMIT_MEMLOCK: 67108864 (67108864)
[ 35.477875] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000070
[ 35.478969] Mem abort info:
[ 35.479296] ESR = 0x96000004
[ 35.479785] Exception class = DABT (current EL), IL = 32 bits
[ 35.480528] SET = 0, FnV = 0
[ 35.480980] EA = 0, S1PTW = 0
[ 35.481345] Data abort info:
[ 35.481680] ISV = 0, ISS = 0x00000004
[ 35.482267] CM = 0, WnR = 0
[ 35.482618] user pgtable: 4k pages, 48-bit VAs, pgdp = (____ptrval____)
[ 35.483486] [0000000000000070] pgd=0000000000000000
[ 35.484041] Internal error: Oops: 96000004 [#1] PREEMPT SMP
[ 35.484788] Modules linked in:
[ 35.485311] CPU: 113 PID: 3973 Comm: io_uring_regist Not tainted 5.1.0-rc3-00012-g40b114779944 #1
[ 35.486712] Hardware name: linux,dummy-virt (DT)
[ 35.487450] pstate: 20400005 (nzCv daif +PAN -UAO)
[ 35.488228] pc : link_pwq+0x10/0x60
[ 35.488794] lr : apply_wqattrs_commit+0xe0/0x118
[ 35.489550] sp : ffff000017e2bbc0
Huh, this looks odd, it's crashing inside the wq setup.
Looks like you found a bug :)
cheers
